The Synagogue parent body:
www.federationofsynagogues.com

The United Synagogue/London Beth-Din online Kosher product search :
Kosher Product Search

Great resources. Philosophy, Ideas, and Contemporary articles:
www.aish.com

The website of the American Orthodox Union – a one stop, all encompassing Jewish resource centre:
www.ou.org

Judaism 101 is an online encyclopedia of Judaism, covering Jewish beliefs, people, places, things, language, scripture, holidays, practices and customs.
www.jewfaq.org